package com.hmdp.service.impl;


import cn.hutool.core.bean.BeanUtil;

import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RedisConstants;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.data.redis.connection.BitFieldSubCommands;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Slf4j

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendcode(String phone, HttpSession session) {
        //1校验手机号

        if (RegexUtils.isPhoneInvalid(phone)){
            //2是否符合
 return Result.fail("手机号格式错误");
        }


        //3符合 生产验证码
        String code = RandomUtil.randomNumbers(6);
        //4保存验证码到session
//        session.setAttribute("code",code);
        stringRedisTemplate.opsForValue().set(RedisConstants.LOGIN_CODE_KEY+phone,code,2,TimeUnit.MINUTES);
        //5 发送验证码
        log.debug("发送短信验证码成功,{}",code);
       return Result.ok() ;
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.校验手机号
        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.不合适返回错误信息
            return Result.fail("手机号格式错误");
        }
//        Object cachecode =
        String cachecode = stringRedisTemplate.opsForValue().get(RedisConstants.LOGIN_CODE_KEY+phone);
        String code = loginForm.getCode();
        if(cachecode == null && !cachecode.equals(code)){
            return Result.fail("验证码错误");
//3.不一致的验证码 报错
        }


        //4.一致的话 根据手机号查询用户  检查是否存在
        User user = query().eq("phone", phone).one();

        //5.不存在 新建并保存用户
        if(user == null){
           user = createUserWithPhone(phone);

        }
        //存在 保存用户信息到session中
        //存在 保存用户信息到Redis中
//        session.setAttribute("user", BeanUtil.copyProperties(user, UserDTO.class));
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>(), CopyOptions.create()
                .setIgnoreNullValue(true)
                .setFieldValueEditor((fieldName,fieldValue)->(fieldValue.toString())));
        String tokenkey = RedisConstants.LOGIN_USER_KEY+token;
        stringRedisTemplate.opsForHash().putAll(tokenkey,userMap);
        stringRedisTemplate.expire(tokenkey,2, TimeUnit.MINUTES);
        return Result.ok(token);
    }

    @Override
    public Result sign() {
        Long userId = UserHolder.getUser().getId();
        LocalDateTime now = LocalDateTime.now();
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key ="sign:" + userId + keySuffix;
        int dayOfMonth = now.getDayOfMonth();
        stringRedisTemplate.opsForValue().setBit(key,dayOfMonth-1,true);
        return Result.ok();
    }

    @Override
    public Result signCount() {
        //获取本月截止今天为止所有的签到记录
        Long userId = UserHolder.getUser().getId();
        LocalDateTime now = LocalDateTime.now();
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key ="sign:" + userId + keySuffix;
        int dayOfMonth = now.getDayOfMonth();
        List<Long> result = stringRedisTemplate.opsForValue().
                bitField(key, BitFieldSubCommands.create().
                        get(BitFieldSubCommands
                                .BitFieldType.unsigned(dayOfMonth)).valueAt(0));
        if (result == null || result.isEmpty()){
            return Result.ok();
        }
        Long num = result.get(0);
        if (num == null || num == 0){
            return  Result.ok();
        }
        int count = 0;
        while (true){
            if ((num & 1) == 0){
                break;
            }else
            {count ++;

            }
            num >>>= 1;
        }
        //
        return Result.ok(count);
    }

    private User createUserWithPhone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName("user_"+RandomUtil.randomString(10));
        save(user);
        return  user;
    }
}
